alleryએક પરીક્ષણ સાચા જવાબ દીઠ +5 અને ખોટા જવાબ દીઠ −2 આપે છે; 18 જવાબોનો સ્કોર 55. સાચી ગણતરી?
A13
B15
C14
D12
Answer & Solution
Correct answer: A. 13
જો c જવાબો સાચા હોય, તો 5c − 2(18 − c) = 55 આપે છે 7c = 91 અને c = 13.
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